All About Sleep

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Across
  1. 3. This 24-hour cycle regulates sleep and wakefulness, influenced by light and darkness. (15 letters)
  2. 7. The hidden, symbolic meaning behind the events in a dream. (12 letters)
  3. 8. According to Freud, the actual storyline and events of a dream. (14 letters)
  4. 10. Difficulty falling or staying asleep, leading to fatigue and poor daytime functioning. (8 letters)
  5. 13. The initial, lightest phase of non-rapid eye movement sleep. (11 letters)
  6. 16. Condition where people physically act out their dreams. (21 letters)
  7. 19. A temporary body clock disruption from crossing multiple time zones. (6 letters)
  8. 20. Sleep disorder with sudden sleep episodes, cataplexy, and sleep paralysis. (10 letters)
Down
  1. 1. The deepest non-REM sleep stage, dominated by delta waves. (11 letters)
  2. 2. Another term for sleepwalking, usually occurring in non-REM sleep. (13 letters)
  3. 4. This theory suggests dreams help process and organize daily memories. (19 letters)
  4. 5. The body’s process of restoring energy and repairing itself during sleep. (12 letters)
  5. 6. A theory proposing dreams result from random brain activity. (18 letters)
  6. 9. The ongoing awareness of surroundings, thoughts, and feelings. (13 letters)
  7. 11. Wrote a book about the "Interpretation of Dreams."
  8. 12. Sleep stage marked by sleep spindles and K-complexes; light sleep lasting about 20 minutes. (11 letters)
  9. 14. Disorder with pauses in breathing during sleep, often causing fatigue. (10 letters)
  10. 15. Dreaming stage with rapid eye movement and high brain activity. (8 letters)
  11. 17. Non-standard work hours that can disrupt the body’s internal clock. (9 letters)
  12. 18. The phenomenon of increased REM sleep following a period of deprivation. (11 letters)